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added crazy bankswitch based on findings by charlesm

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This commit is contained in:
Michaël Banaan Ananas 2012-12-23 20:16:28 +00:00
parent 5e50268c8b
commit 3fc41f8c7a
1 changed files with 29 additions and 9 deletions
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38
src/mame/drivers/kurukuru.c
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@ -317,9 +317,21 @@ WRITE8_MEMBER(kurukuru_state::kurukuru_out_latch_w)
WRITE8_MEMBER(kurukuru_state::kurukuru_bankswitch_w)
{
// d4,d5: bank
// other bits: ?
membank("bank1")->set_entry(data >> 4 & 3);
membank("bank1")->set_entry(7); // remove banked rom
/*
if bits 5,4 are 00,10,01 then IC10 is enabled
if bits 3,2 are 00,10,01 then IC18 is enabled
if bits 1,0 are 00,10,01 then IC23 is enabled
Then in addition, A15 (ROM half) is determined by the low bit.
Note that in theory, it can cause a conflict by enabling more than one chip,
but the game never does this.
*/
for (int chip = 0; chip < 3; chip++)
{
if ((data & 3) != 3)
membank("bank1")->set_entry((chip << 1) | (~data & 1));
data >>= 2;
}
}
WRITE8_MEMBER(kurukuru_state::kurukuru_soundlatch_w)
@ -399,6 +411,10 @@ static ADDRESS_MAP_START( audio_io, AS_IO, 8, kurukuru_state )
AM_RANGE(0x60, 0x60) AM_MIRROR(0x0f) AM_READ(kurukuru_soundlatch_r)
AM_RANGE(0x70, 0x70) AM_MIRROR(0x0f) AM_READ(kurukuru_adpcm_timer_irqack_r)
ADDRESS_MAP_END
/*
Reading _any_ I/O port on the audio CPU should return ADPCM IRQ flag on bit 3, and sound command write status flag on bit 4.
How does this work when reading the sound latch? The game (un)fortunately doesn't test this, I'd rather leave it unemulated then.
*/
/* YM2149 ports */
@ -497,7 +513,7 @@ INPUT_PORTS_END
void kurukuru_state::machine_start()
{
membank("bank1")->configure_entries(0, 4, memregion("maincpu")->base(), 0x8000);
membank("bank1")->configure_entries(0, 8, memregion("user1")->base(), 0x8000);
}
void kurukuru_state::machine_reset()
@ -581,13 +597,17 @@ MACHINE_CONFIG_END
***************************************************************************/
ROM_START( kurukuru )
ROM_REGION( 0x28000, "maincpu", 0 )
ROM_LOAD( "kp_17l.ic17", 0x00000, 0x08000, CRC(9b552ebc) SHA1(07d0e62b7fdad381963a345376b72ad31eb7b96d) ) // program code
ROM_LOAD( "10.ic10", 0x08000, 0x10000, CRC(3d6012bc) SHA1(2764f70e0e0bef3f2f71dd6c78e0a4189057beca) ) // title + text + ingame gfx
ROM_LOAD( "18.ic18", 0x18000, 0x10000, CRC(afb13c6a) SHA1(ac3cd40fad081f7a2b3d1fc72ea96282b9d1f4a3) ) // big frog gfx
ROM_REGION( 0x08000, "maincpu", 0 )
ROM_LOAD( "kp_17l.ic17", 0x00000, 0x08000, CRC(9b552ebc) SHA1(07d0e62b7fdad381963a345376b72ad31eb7b96d) ) // program code
ROM_REGION( 0x40000, "user1", 0 ) // maincpu banked roms
ROM_FILL( 0x00000, 0x10000, 0xff ) // ic23: unpopulated
ROM_LOAD( "18.ic18", 0x10000, 0x10000, CRC(afb13c6a) SHA1(ac3cd40fad081f7a2b3d1fc72ea96282b9d1f4a3) ) // ic18: big frog gfx
ROM_LOAD( "10.ic10", 0x20000, 0x10000, CRC(3d6012bc) SHA1(2764f70e0e0bef3f2f71dd6c78e0a4189057beca) ) // ic10: title + text + ingame gfx
ROM_FILL( 0x30000, 0x10000, 0xff ) // dummy entry for when no romchip is selected
ROM_REGION( 0x10000, "audiocpu", 0 )
ROM_LOAD( "4.ic4", 0x00000, 0x10000, CRC(85d86f32) SHA1(f2aa93d702e6577f8f2204c74c44ac26d05be699) ) // code & adpcm samples
ROM_LOAD( "4.ic4", 0x00000, 0x10000, CRC(85d86f32) SHA1(f2aa93d702e6577f8f2204c74c44ac26d05be699) ) // code & adpcm samples
ROM_REGION( 0x800, "plds", 0 )
ROM_LOAD( "51.ic26", 0x0000, 0x0104, CRC(ce4a601b) SHA1(07f5bbb327b220e5846927cbb91149174dd07b36) )